Paste problem with a nonstandard key signature

[northbrae]

I've made myself a nonstandard key signature (Bb + C#, i.e. A hijaz) in order to save myself tons of accidentals in a piece of Bulgarian music.

When I copy an existing measure and paste it farther along (as there are lots of repeating measures), a courtesy key signature cluster appears in the pasted measure (B natural + C natural, followed by Bb + C#), which so far I can't remove. I have the document set to "hide courtesy key signatures". In addition, the pasted measure is also bracketed with double barlines, and the combination of these two odd behaviors feels like a bug to me. But perhaps instead I missed a subtlety of the nonstandard key signature process.

This is Finale 27.4.1.146 on MacOS Monterey 12.7.6.

Suggestions?
David

[motet]

I can't say I've had experience with nonstandard key signatures, but check the copy filter and make sure "Copy clefs: always" is selected.

[northbrae]

> check the copy filter and make sure "Copy clefs: always" is selected

Aha! I removed "key signatures" from the copy filter and that did the trick! No more spurious courtesy key signatures! Thank you for introducing me to the copy filter.

David

[motet]

Oh, good! (Silly me, I confused clefs and key signatures!)